Curious to hear feedback as well. I have a small one that needs pulled out as well and for the money, it might even be worth a try without any feedback.
I tired it on a larger ding, took me about 15 tries and I got 90% of it out. Then a smaller same but only few tries. Mine is black so harder but both went from noticeable to can hardly tell. On white or anything but black better.
I experimented around little with the adjusters shown in the online manual and then let the glue sit a little longer so I could get a better pull. If you put some release agent on the glue it comes right off.